Na 的结构绘图
Qiurong Wu1, Jian Huang2, Xiao Fan3
1Beijing Frontier Research Center for Biological Structures, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
Nature communications
|June 3, 2023
概括
这项研究揭示了使用冷EM结构的电压关闭 (Nav) 通道上的新型药物结合部位. 了解这些结合模式可以促进治疗,疼痛和心律失常的药物开发.
科学领域:
- 生物物理学的生物物理.
- 药理学 药理学是指药理学的学科.
- 结构生物学 结构生物学
背景情况:
- 电压导入 (Nav) 通道是神经和心脏疾病的关键药物标.
- 许多Nav通道调制器的精确结合机制尚未完全理解.
- 最近的结构研究提供了洞察力,但缺乏药物相互作用的全面地图.
研究的目的:
- 阐明人类Nav1.7的高分辨率结构与各种药物和候选药物复合.
- 在Nav通道中识别和描述新的药物结合点.
- 为了解Nav通道调节器的药理学提供结构基础.
主要方法:
- 使用高分辨率冷电子显微镜 (cryo-EM) 来确定结构.
- 结构在2.63.2 Å时被解析为人类的Nav1.7复杂化与卡巴马泽,布皮瓦卡因,拉科萨米德,文波西丁,哈德维基基酸和维克索特里金.
- 对现有结构数据进行了比较分析.
主要成果:
- 在细胞内门下方 (BIG部位) 确定了一个结合部位,可容纳卡巴马西平,布皮瓦卡因和拉克萨米德.
- 在选择性过器内发现了lacosamide的第二个结合部位,可以从中央腔中进入.
- 维诺和哈德维基基酸与III-IV化结合,而维克索与毛孔域的IV-I化结合.
结论:
- 该研究揭示了Nav1.7上多个不同的药物结合位点,包括细胞内,毛孔相关的化和选择性过器.
- 这些发现提供了药物相互作用与Nav通道的详细3D结构图.
- 鉴定到的结合部位为合理设计新的Nav通道向治疗方法提供了关键的见解.
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